Contribution of strain-hardening cementitious composites (SHCC) to shear resistance in hybrid reinforced concrete beams
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Strain Hardening Cementitious Composite (SHCC) is an innovative type of fibrereinforced
cement-based composite that has superior tensile properties. Because
of this, it holds the potential to enhance the shear capacity of reinforced concrete
(RC) beams, if applied properly. This paper presents the general and distinctive
properties of SHCC as well as a literature review of topics related to the contribution
of SHCC layers to the shear resistance of RC beams with and without shear
reinforcement. Based on the analysed results, it is concluded that the main
characteristics of SHCC are its microcracking behaviour, high ductility, and
increased tensile strength (between 2 and 8 MPa) at large deformations. When used
in structural elements, SHCC develops multiple parallel cracks compared to
concentrated cracks in conventionally reinforced concrete. The biggest
disadvantage of SHCC is its significant drying shrinkage. Although showing high
variability, using SHCC as lami...nates with a thickness of 10 mm improves the shear
capacity of hybrid RC beams, but debonding of interfaces in a hybrid system occurrs
in some cases.
Keywords:
strain hardening cementitious composite / hybrid beam / ductility / crack / shrinkageSource:
Building materials and structures, 2023, 66, Article 2300006L in pressPublisher:
- Faculty of Civil Engineering, University of Belgrade
- Society for Materials and Structures Testing of Serbia
- Association of Structural Engineers of Serbia
Funding / projects:
- Hybrid Solution for Improved Green Concrete Performance – HyCRETE
- Dutch Organization for Scientific Research (NWO), grant “Optimization of interface behavior for innovative hybrid concrete structures” (project number 16814)